Install MySQL in CentOS and use Navicat for MySql in Windows

Check whether the installation has been installed:
Yum list installed mysql *
Rpm-qa | grep mysql *
 
Check whether the installation package is available:
Yum list mysql *
 
Install the mysql client:
Yum install mysql
 
Install the mysql server:
Yum install mysql-server
Yum install mysql-devel

Start & stop database character set settings
Add default-character-set = utf8 to the [mysqld] configuration section in the mysql configuration file/etc/my. cnf.

Method: vi/etc/my. cnf: move the cursor by pressing the top, bottom, left, and right keys, press the letter "I" to enter the editing status, Shift + Insert paste content (I am operating through Xshell), and Press ESC to enter the command mode, enter ": wq" and press Enter.

Start the mysql service:
Service mysqld start or/etc/init. d/mysqld start
Start startup:
Chkconfig-add mysqld to check whether the startup setting is successful. chkconfig -- list | grep mysql *
 
Mysqld 0: Disable 1: Disable 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable
Stop:
Service mysqld stop
Log on to create a root administrator:
Mysqladmin-u root password 123456
If this operation fails, the following error occurs: mysqladmin: Can't turn off logging; error: 'Access denied; you need the SUPER privilege for this operation'
Logon:
Mysql-u root-p: enter the password.
Forgot password:
Service mysqld stop
 
Mysqld_safe -- user = root -- skip-grant-tables

After executing this statement, you can no longer enter the command,

Output: 140616 19:23:09 mysqld_safe Logging to '/var/log/mysqld. log '.
140616 19:23:09 mysqld_safe Starting mysqld daemon with databases from/var/lib/mysql

Then, the system stops there and needs to run the command on the terminal;
 
Mysql-u root
 
Use mysql;
 
Update user set password = password ('000000') where user = 'root ';
 
Flush privileges;
 However, running these commands fails to solve the problem that Navicat for MySql cannot be connected in Windows;

Remote access to the port number of the open firewall, or disable the firewall;
Mysql adds permissions: the user table in the mysql database adds a record with host as "%" and user as "root ".

This test is useless;

Several important directory database directories of Linux MySQL
/Var/lib/mysql/
Configuration File
/Usr/share/mysql (mysql. server command and configuration file)
Related commands
/Usr/bin (commands such as mysqladmin mysqldump)
Start script
/Etc/rc. d/init. d/(directory for starting the script file mysql)

Use Navicat for MySql connection in Windows

Error: 1130 host is not allowed to connect to this mysql server

Solution:

1. Change the table.

It may be that your account is not allowed to log on remotely, but only on localhost. At this time, you only need to log in to mysql on the computer of localhost, and change the "host" entry in the "user" table in the "mysql" database to "%" from "localhost"

Mysql-u root-pvmwaremysql> use mysql;

Mysql> update user set host = '%' where user = 'root ';

Mysql> select host, user from user;

2. Authorization method.

For example, if you want myuser to use mypassword to connect to the mysql server from any host.

Grant all privileges on *. * TO 'myuser' @ '%' identified by 'mypassword' with grant option;

Flush privileges;

This test passed, but remember to modify the "myuser" and "mypassword" in the statement. I just took it and executed it directly. The result was just half a day before it was found.

If you want to allow myuser to connect to the mysql server from a host whose ip address is 192.168.1.6, and use mypassword as the password

Grant all privileges on *. * TO 'myuser' @ '192. 168.1.3 'identified BY 'mypassword' with grant option;

Flush privileges;

If you want to allow myuser to connect to the dk database of the mysql server from a host with ip address 192.168.1.6, and use mypassword as the password

Grant all privileges on dk. * TO 'myuser' @ '192. 168.1.3 'identified BY 'mypassword' with grant option;

Flush privileges;

Run the following command on the machine where mysql is installed:

1. d: \ mysql \ bin \> mysql-h localhost-u root // enter the MySQL server.

2. mysql> grant all privileges on *. * TO 'root' @ '%' with grant option // GRANT data access permissions TO any host

3. mysql> flush privileges // The modification takes effect.

4. mysql> EXIT // EXIT the MySQL server

In this way, you can log on to any other host as the root user!